CONFIG_CRYPTO_CRC32C_X86_64 is not available for the selected architecture x86.
Result is shown for architecture x86 or 64BIT

CONFIG_CRYPTO_CRC32C_X86_64 (not configurable)

configname: CONFIG_CRYPTO_CRC32C_X86_64

Linux Kernel Configuration
└─>Cryptographic API
└─>CRYPTO_CRC32C_X86_64
In linux kernel since version 3.8 (release Date: 2013-02-18)
In Intel processor with SSE4.2 supported, the processor will
support CRC32C calculation using hardware accelerated CRC32
instruction optimized with PCLMULQDQ instruction when available.